This is reported by Axios citing sources.
According to them, Israel has successfully targeted 12 "planetary mixers" that are used for producing solid fuel for long-range ballistic missiles. These missiles are a core component of Iran's missile arsenal.
These mixers are highly sophisticated equipment, which means Iran will not be able to manufacture them independently and will instead have to purchase them from China. One of Axios's sources believes that repairing the mixers and consequently producing new missiles could take at least a year.
This will limit Iran's ability to replenish the stockpiles of ballistic missiles for the Hezbollah group and the Yemeni Houthis, and may also deter Iran from launching subsequent large-scale missile strikes against Israel.
Furthermore, according to Israeli sources, the attack also targeted four S-300 air defense batteries that were protecting the capital Tehran, as well as nuclear and energy facilities in Iran.
A drone manufacturing plant and a site in the city of Parchin, previously used for research and development of nuclear weapons, were also hit. Meanwhile, Iranian military officials stated that several radar systems sustained minor damage as a result of the strike and are currently undergoing repairs.